JP2008050876A - Retaining block including fiber anchor belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect an anchor belt composed of synthetic resin fiber from concrete by improving the execution performance of work, which is lacked in a Terre Armee construction method. <P>SOLUTION: At least the base end of the fibrous anchor belt 6 coated with resin is buried and fixed in concrete forming a retaining block 1. As a belt-like woven fabric 6 forming the anchor belt 5, a grid-like woven fabric may be used. Urethane resin or the like is used for covering. The blocks 1 are aligned, and the anchor belt 5 is stretched on the back banking 11. Further banking 11 is further performed thereon, thereby fixing the anchor belt 5 by friction with the lining earth. In some case, one end which is coated with resin is buried and fixed in the cast-in place concrete structure to form the anchor belt 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a retaining block for supporting a sediment load of embankment and a retaining method for supporting a load of the embankment by a block or a concrete structure and preventing a slope from collapsing.

  There are methods to install concrete blocks in front of the embankment and to construct concrete structures on-site in order to support the sediment load on the embankment and prevent the slope from collapsing. These concrete blocks and concrete structures are connected and fixed to anchors that are buried and fixed in embankments to prevent them from falling.

  As an anchor embedded in the embankment, for example, there is a so-called tail arme. The tail arme extends a metal strip called a strip on the embankment, embanks the strip, and connects the concrete block and the strip installed on the front of the embankment. The embankment weight acts on the strip, the strip functions as an anchor, and the blocks connected to the strip are connected and fixed to support the sediment load.

  The metal strip in the tail arm as described above has a heavy weight, requires a lot of work, and requires a lot of work. In addition, the connection work between the metal strip and the block is troublesome, and the construction period becomes long. In addition, metal such as bolts and nuts used for connecting the strip and the block may rust, and the rusted portion corrodes and breaks.

  In order to solve these problems, as in the invention described in Japanese Patent Application Laid-Open No. 2006-152786 or Japanese Patent Application Laid-Open No. 2006-152790, an intermediate portion of a strip-shaped strip made of synthetic resin fibers is folded, and the folded portion We are developing a unit that is embedded in the concrete part of the block and integrated with the block.

However, embedding strips made of synthetic resin fibers directly into the concrete is susceptible to the influence of the alkaline environment, and the concrete particles are likely to enter between the fibers and break easily. Was buried in concrete. The operation of passing through such a sheath is troublesome, and even if it is passed through the sheath, concrete nodules easily adhere to the portion coming out of the sheath, and there is a risk of breakage at that portion.
JP 2006-152786 A JP 2006-152790 A

  The problem to be solved by the present invention is that the strength of the fiber belt is reduced due to the size of construction work, the alkalinity of the concrete and the influence of particles.

  The most important feature of the present invention is that at least the base end portion of the fiber anchor belt whose resin base is coated with a base end is embedded and fixed in concrete.

  Since concrete blocks and concrete structures made in the field use fiber anchor belts, they are lightweight and flexible, so that they can be easily laid on the embankment and the workability is remarkably improved.

  Since the fiber anchor belt is coated with resin at least a required part, it is not affected by the alkalinity of the concrete, and even if noro etc. adheres, the particles do not enter between the fibers and the strength does not deteriorate. I found a thing.

  Since one end of the fiber anchor belt is embedded and integrated in a block or a concrete structure, there is no connection part, there is no need for connection work, and there is no concern about rusting of the connection part.

  There is no need to insert the fiber anchor belt into the sheath and the construction is simple.

  By storing the fiber anchor belt in the storage box, it can be prevented from deterioration due to ultraviolet rays and adhesion of concrete from manufacturing to storage / shipping and on-site construction, and the strength of the belt is increased. Can hold.

  As a fiber anchor belt, it is passed between a plurality of vertical lines continuous in the longitudinal direction of the belt arranged in parallel at intervals and a vertical line in the width direction of the belt, and is appropriately spaced in the longitudinal direction of the vertical lines. By adopting a belt-like belt formed in a grid shape with a bendable horizontal line that is passed with a gap, the concrete enters between the lattices and the adhesion to the concrete increases.

The earth retaining block according to the present invention, in the concrete constituting the block,
The base end portion of the fiber anchor belt at least the base end portion coated with resin is embedded and fixed.

  In addition, the earth retaining method according to the present invention is arranged by arranging the earth retaining blocks on the front face of the embankment, or constructing the earth retaining concrete structure at the front face of the embankment by placing concrete on the site, and A soil retaining method supported by a block or a concrete structure, in which the base end portion composed of a fiber anchor belt coated with a resin at least at the base end portion is embedded and fixed in the concrete of the block or structure. By extending the anchor belt on the embankment and further embanking it, the anchor belt is sandwiched and fixed by friction with the soil, or the bearing anchor is fixed to the end opposite to the buried end and covered with soil , To prevent the blocks and concrete structures from overturning.

<1> Earth retaining block FIG. 1 shows a concrete earth retaining block 1 according to the present invention, which has reinforcing portions 3 and 3 which are continuous in parallel to the back surface of an upright plate portion 2. ing. One or a plurality of concave portions 4 are provided in the upper and lower intermediate portions of the reinforcing portion 3.

<2> Anchor belt In the figure, reference numeral 5 denotes an anchor belt for anchoring and fixing the block 1, and is composed of a belt-like woven fabric 6 manufactured by weaving polyester fibers. As shown in FIG. 7, the belt-like woven fabric 6 includes a plurality of vertical lines 7 that are continuous in the longitudinal direction of the belt 5 and arranged in parallel at intervals, and in the width direction of the belt 5, between the vertical lines 7. A bendable horizontal line 8 is passed to form a grid. The horizontal lines 8 are provided at intervals in the longitudinal direction of the belt 5.

<3> Coating One end of the fibrous anchor belt 5 is coated with a resin having a desired length. As the resin, thermosetting resin or thermoplastic resin is used, and these are coated and solidified, so that the alkalinity of the concrete, scratches caused by Noro particles entering between the fibers, the water pressure of the concrete, etc. The belt-like woven fabric 6 of the anchor belt 5 is protected from deterioration factors. If the grid belt material is thermoplastic fiber, it is preferable to use room temperature epoxy resin or urethane resin so that the material properties do not change significantly, and the material is carbon fiber or aramid fiber, which has high heat resistance. Etc., it is desirable to use a thermoplastic resin. In the embodiment, urethane resin is used. The coating method employs a method in which one end of the belt-shaped woven fabric cloth 6 is impregnated and coated in a resin melted at room temperature.

<4> Fixing the anchor belt The resin-coated end of such a belt-like woven fabric 6 is positioned at the bottom of the recess 4 of the block 1 being manufactured, and in the concrete in which a part of the end is cast. Embed in, adhere to concrete, and fix the end. The depth of embedding is about 50 mm to 300 mm, and a suitable strength is obtained even in practice about 100 mm. The portion embedded in the concrete of the belt-like woven fabric 6 needs to be sufficiently resin-coated, but the desired length of the portion coming out of the concrete is also preferably coated in order to avoid adhesion of noro and the like. As shown in FIG. 1, FIG. 5 or FIG. 6, the anchor belt 5 may be fixed either horizontally or vertically. When the strip-shaped woven fabric 5 is in a grid shape, the adhesive force in the concrete increases.

<5> Protection of Anchor Belt It is preferable that the belt-shaped woven fabric 6 to be the anchor belt 5 is wound up and stored in the storage box 9. The storage box 9 can be widely used, such as paper, plastic, or metal. As shown in FIG. 2, the storage box 9 has a size and shape that can be stored in the recess 4 of the block 1 so that one end of the belt-like cloth 6 can protrude from the bottom surface. A side surface opposite to the bottom surface is a lid 10. With the belt-like woven fabric 6 protruding, the storage box 9 is installed at the position of the concave portion 4 and concrete is placed to bury the protruding end of the belt-like woven fabric 6. Other than the portion of the belt-shaped woven fabric 6 embedded in the concrete, the concrete no stick adheres and the particles do not enter between the fibers. Moreover, if the storage box 9 is made dark, the inner strip-shaped woven fabric 6 can be further protected from ultraviolet rays. When the belt-like woven fabric 6 is used as the anchor belt 5, the lid 10 may be opened and pulled out.
As a means for protection, in addition to the box, a means for winding up the anchor belt 5 and storing it in a dark bag made of synthetic resin or the like can also be employed.

<6> Construction of retaining wall The retaining block 1 is lined up, down, left and right on the front of the position where the embankment block 1 is embanked. A bank 11 is applied behind the block 1, and the anchor belt 5 on the back of the block 1 is pulled out and stretched on the bank 11. The embankment 11 is further applied thereon, and the anchor belt 5 is fixed by friction with the sandwiched soil. When the belt-like woven fabric 6 is in a grid shape, the frictional force is increased and the fixing force in the soil is improved. The upper anchor belt 5 is extended on the upper embankment 11, and the same operation is repeated.

<7> Tensile strength of anchor belt Table 1 shows the tensile strength test results of the belt-shaped woven fabric 6 coated with resin as described above. As shown in Table 1, the tensile strength of the resin-coated belt-like woven fabric 6 shows about twice the strength when the resin coating is not performed. In terms of the type of resin, there was no significant difference in breaking load between epoxy resin and urethane resin.

<8> Situation of Breaking The belt-shaped woven fabric 6 subjected to resin coating was not broken at the resin-coated portion, but was broken at the resin interface portion or the dirty portion was broken. That is, the resin-coated portion has a higher strength than those portions. Moreover, in the experiment example which did not coat | cover, although the embedding depth was changed into 150 mm and 200 mm, the test was implemented, but all fractured at the concrete interface part, the adhesion with the concrete came off, and the edge part slipped out from the concrete. There was no example.

<9> On-site construction of earth retaining FIG. 4 shows an embodiment of the earth retaining method by on-site casting. The formwork is assembled and the retaining wall 12 is constructed from cast-in-place concrete. At that time, a part of the end of the belt-shaped woven fabric 6 whose one end is coated with resin is buried and fixed. The embankment 11 is applied behind the retaining wall 12, and the belt-like woven fabric 6 is extended as an anchor belt 5 thereon. Further, the bank 11 is applied and fixed by friction with the sandwiched soil. Alternatively, a bearing anchor or the like can be fixed to the end opposite to the buried end, covered with soil, and the retaining wall can be prevented from falling.

  One end of the belt-like woven fabric 6 is coated with a resin, and this is embedded and fixed in concrete, but in a building, a tensile force is borne on the belt-like woven fabric 6 and the connection reinforcement between the concrete structures is used. It can also be applied to.

It is a perspective view of a earth retaining block. It is a partial perspective view of the earth retaining block to which the anchor belt is fixed. It is a perspective view of the earth retaining method using an earth retaining block. It is sectional drawing of the earth retaining method using an earth retaining block. It is a rear view of a earth retaining block. It is a rear view of a earth retaining block. It is a partial front view of a strip-shaped woven fabric. It is a perspective view of the on-site earth retaining method.

Explanation of symbols

1: Dam retaining block 2: Plate part 3: Reinforcing part 4: Recessed part 5: Anchor belt 6: Belt-like woven fabric 7: Fine band 8: String body 9: Storage box 10: Lid 11: Filling 12: Retaining wall

  The present invention relates to a retaining block for supporting a sediment load of embankment and a retaining method for supporting a load of the embankment by a block or a concrete structure and preventing a slope from collapsing.

  There are methods to install concrete blocks in front of the embankment and to construct concrete structures on-site in order to support the sediment load on the embankment and prevent the slope from collapsing. These concrete blocks and concrete structures are connected and fixed to anchors that are buried and fixed in embankments to prevent them from falling.

  As an anchor embedded in the embankment, for example, there is a so-called tail arme. The tail arme extends a metal strip called a strip on the embankment, embanks the strip, and connects the concrete block and the strip installed on the front of the embankment. The embankment weight acts on the strip, the strip functions as an anchor, and the blocks connected to the strip are connected and fixed to support the sediment load.

  The metal strip in the tail arm as described above has a heavy weight, requires a lot of work, and requires a lot of work. In addition, the connection work between the metal strip and the block is troublesome, and the construction period becomes long. In addition, metal such as bolts and nuts used for connecting the strip and the block may rust, and the rusted portion corrodes and breaks.

  In order to solve these problems, as in the invention described in Japanese Patent Application Laid-Open No. 2006-152786 or Japanese Patent Application Laid-Open No. 2006-152790, an intermediate portion of a strip-shaped strip made of synthetic resin fibers is folded, and the folded portion We are developing a unit that is embedded in the concrete part of the block and integrated with the block.

However, embedding strips made of synthetic resin fibers directly into the concrete is susceptible to the influence of the alkaline environment, and the concrete particles are likely to enter between the fibers and break easily. Was buried in concrete. The operation of passing through such a sheath is troublesome, and even if it is passed through the sheath, concrete nodules easily adhere to the portion coming out of the sheath, and there is a risk of breakage at that portion.
JP 2006-152786 A JP 2006-152790 A

  The problem to be solved by the present invention is that the strength of the fibrous belt is reduced due to the size of construction work and the alkalinity of concrete and particles.

The present invention is installed side by side at the front of the embankment,
In the retaining block that is moored and fixed by the anchor belt extended in the embankment,
A plurality of continuous vertical lines in the longitudinal direction of the belt arranged in parallel at intervals;
With a bendable horizontal line that is passed between the vertical lines in the width direction of the belt and at an appropriate interval in the longitudinal direction of the vertical line,
It is formed in a grid shape,
At least the base end portion of the fiber anchor belt which is resin-coated by solidifying with a thermosetting resin or a thermoplastic resin,
It is buried and fixed in the concrete that forms the block.
In the above earth retaining block,
Other parts than the base end part embedded in the concrete that forms the block are rolled up and stored in the storage box.
Furthermore, the earth retaining method of the present invention is arranged with the earth retaining blocks arranged side by side at the front of the embankment,
Extend the fiber anchor belt on the embankment,
Further embedding on top of that, a fiber anchor belt is sandwiched and fixed by friction with the soil.
Furthermore, the earth retaining concrete structure to be constructed by placing concrete is constructed at the front position of the embankment,
In the earth retaining method that supports sediment load by concrete structures,
A plurality of continuous vertical lines in the longitudinal direction of the belt arranged in parallel at intervals;
With a bendable horizontal line that is passed between the vertical lines in the width direction of the belt and at an appropriate interval in the longitudinal direction of the vertical line,
It is formed in a grid shape,
At least the base end portion of the fiber anchor belt which is resin-coated by solidifying with a thermosetting resin or a thermoplastic resin,
Embedded and fixed in the concrete of the earth retaining concrete structure,
Extend the fiber anchor belt on the embankment,
By further embankment on it, the fiber anchor belt is sandwiched and fixed by friction with the soil,
This prevents the fall of the earth retaining concrete structure.

Since the <a> concrete block and the concrete structure made in the field use a fiber anchor belt, since it is lightweight and flexible, laying work on the embankment is easy and workability is remarkably improved.
<B> Since the fiber anchor belt is coated with resin at least part of the required part, it is not affected by the alkalinity of the concrete, and even if noro adheres, the particles do not enter between the fibers and the strength deteriorates. I discovered that there was nothing.
<C> Since one end of the fiber anchor belt is embedded and integrated in a block or a concrete structure, there is no connection part, there is no need for connection work, and there is no concern about rusting of the connection part.
<D> There is no need to insert the fiber anchor belt into the sheath, and the construction is simple.
<E> By storing the fiber anchor belt in the storage box, it can be prevented from deterioration due to ultraviolet rays and adhesion of concrete from manufacturing to storage / shipping and construction on site, and the strength of the belt Can be kept higher.
<F> As a fiber anchor belt, the belt is passed between a plurality of vertical lines continuous in the longitudinal direction of the belt arranged in parallel at intervals and the vertical line in the width direction of the belt, and the longitudinal direction of the vertical lines By adopting a belt-like belt formed in a grid shape with a bendable horizontal line passed at an appropriate interval, the concrete enters between the lattices, and the adhesion to the concrete increases.

<1> Earth retaining block FIG. 1 shows a concrete earth retaining block 1 according to the present invention, which has reinforcing portions 3 and 3 which are continuous in parallel to the back surface of an upright plate portion 2. ing. One or a plurality of concave portions 4 are provided in the upper and lower intermediate portions of the reinforcing portion 3.

<2> Anchor belt In the figure, reference numeral 5 denotes an anchor belt for anchoring and fixing the block 1, and is composed of a belt-like woven fabric 6 manufactured by weaving polyester fibers. As shown in FIG. 7, the belt-like woven fabric 6 includes a plurality of vertical lines 7 that are continuous in the longitudinal direction of the belt 5 and arranged in parallel at intervals, and in the width direction of the belt 5, between the vertical lines 7. A bendable horizontal line 8 is passed to form a grid. The horizontal lines 8 are provided at intervals in the longitudinal direction of the belt 5.

<3> Coating One end of the fibrous anchor belt 5 is coated with a resin having a desired length. As the resin, thermosetting resin or thermoplastic resin is used, and these are coated and solidified, so that the alkalinity of the concrete, scratches caused by Noro particles entering between the fibers, the water pressure of the concrete, etc. The belt-like woven fabric 6 of the anchor belt 5 is protected from deterioration factors. If the grid belt material is thermoplastic fiber, it is preferable to use room temperature epoxy resin or urethane resin so that the material properties do not change significantly, and the material is carbon fiber or aramid fiber, which has high heat resistance. Etc., it is desirable to use a thermoplastic resin. In the embodiment, urethane resin is used. The coating method employs a method in which one end of the belt-shaped woven fabric cloth 6 is impregnated and coated in a resin melted at room temperature.

<4> Fixing the anchor belt The resin-coated end of such a belt-like woven fabric 6 is positioned at the bottom of the recess 4 of the block 1 being manufactured, and in the concrete in which a part of the end is cast. Embed in, adhere to concrete, and fix the end. The depth of embedding is about 50 mm to 300 mm, and a suitable strength is obtained even in practice about 100 mm. The portion embedded in the concrete of the belt-like woven fabric 6 needs to be sufficiently resin-coated, but the desired length of the portion coming out of the concrete is also preferably coated in order to avoid adhesion of noro and the like. As shown in FIG. 1, FIG. 5 or FIG. 6, the anchor belt 5 may be fixed either horizontally or vertically. When the strip-shaped woven fabric 5 is in a grid shape, the adhesive force in the concrete increases.

<5> Protection of Anchor Belt It is preferable that the belt-shaped woven fabric 6 to be the anchor belt 5 is wound up and stored in the storage box 9. The storage box 9 can be widely used, such as paper, plastic, or metal. As shown in FIG. 2, the storage box 9 has a size and shape that can be stored in the recess 4 of the block 1 so that one end of the belt-like cloth 6 can protrude from the bottom surface. A side surface opposite to the bottom surface is a lid 10. With the belt-like woven fabric 6 protruding, the storage box 9 is installed at the position of the concave portion 4 and concrete is placed to bury the protruding end of the belt-like woven fabric 6. Other than the portion of the belt-shaped woven fabric 6 embedded in the concrete, the concrete no stick adheres and the particles do not enter between the fibers. Moreover, if the storage box 9 is made dark, the inner strip-shaped woven fabric 6 can be further protected from ultraviolet rays. When the belt-like woven fabric 6 is used as the anchor belt 5, the lid 10 may be opened and pulled out.
As a means for protection, in addition to the box, a means for winding up the anchor belt 5 and storing it in a dark bag made of synthetic resin or the like can also be employed.

<6> Construction of retaining wall The retaining block 1 is lined up, down, left and right on the front of the position where the embankment block 1 is embanked. A bank 11 is applied behind the block 1, and the anchor belt 5 on the back of the block 1 is pulled out and stretched on the bank 11. The embankment 11 is further applied thereon, and the anchor belt 5 is fixed by friction with the sandwiched soil. When the belt-like woven fabric 6 is in a grid shape, the frictional force is increased and the fixing force in the soil is improved. The upper anchor belt 5 is extended on the upper embankment 11, and the same operation is repeated.

<7> Tensile strength of anchor belt Table 1 shows the tensile strength test results of the belt-shaped woven fabric 6 coated with resin as described above. As shown in Table 1, the tensile strength of the resin-coated belt-like woven fabric 6 is about twice as strong as when the resin coating is not performed. In terms of the type of resin, there was no significant difference in breaking load between epoxy resin and urethane resin.

<8> Situation of Breaking The belt-shaped woven fabric 6 subjected to resin coating was not broken at the resin-coated portion, but was broken at the resin interface portion or the dirty portion was broken. That is, the resin-coated portion has a higher strength than those portions. Moreover, in the experiment example which did not coat | cover, although the embedding depth was changed into 150 mm and 200 mm, the test was implemented, but all fractured at the concrete interface part, the adhesion with the concrete came off, and the edge part slipped out from the concrete. There was no example.

<9> On-site construction of earth retaining FIG. 4 shows an embodiment of the earth retaining method by on-site casting. The formwork is assembled and the retaining wall 12 is constructed from cast-in-place concrete. At that time, a part of the end of the belt-shaped woven fabric 6 whose one end is coated with resin is buried and fixed. The embankment 11 is applied behind the retaining wall 12, and the belt-like woven fabric 6 is extended as an anchor belt 5 thereon. Further, the bank 11 is applied and fixed by friction with the sandwiched soil. Alternatively, a bearing anchor or the like can be fixed to the end opposite to the buried end, covered with soil, and the retaining wall can be prevented from falling.

It is a perspective view of a earth retaining block. It is a partial perspective view of the earth retaining block to which the anchor belt is fixed. It is a perspective view of the earth retaining method using an earth retaining block. It is sectional drawing of the earth retaining method using an earth retaining block. It is a rear view of a earth retaining block. It is a rear view of a earth retaining block. It is a partial front view of a strip-shaped woven fabric. It is a perspective view of the on-site earth retaining method.

Explanation of symbols

1: Dam retaining block 2: Plate part 3: Reinforcing part 4: Recessed part 5: Anchor belt 6: Belt-like woven fabric 7: Fine band 8: String body 9: Storage box 10: Lid 11: Filling 12: Retaining wall

  The present invention relates to a retaining block for supporting a sediment load of embankment.

  There are methods to install concrete blocks in front of the embankment and to construct concrete structures on-site in order to support the sediment load on the embankment and prevent the slope from collapsing. These concrete blocks and concrete structures are connected and fixed to anchors that are buried and fixed in embankments to prevent them from falling.

  As an anchor embedded in the embankment, for example, there is a so-called tail arme. The tail arme extends a metal strip called a strip on the embankment, embanks the strip, and connects the concrete block and the strip installed on the front of the embankment. The embankment weight acts on the strip, the strip functions as an anchor, and the blocks connected to the strip are connected and fixed to support the sediment load.

  The metal strip in the tail arm as described above has a heavy weight, requires a lot of work, and requires a lot of work. In addition, the connection work between the metal strip and the block is troublesome, and the construction period becomes long. In addition, metal such as bolts and nuts used for connecting the strip and the block may rust, and the rusted portion corrodes and breaks.

  In order to solve these problems, as in the invention described in Japanese Patent Application Laid-Open No. 2006-152786 or Japanese Patent Application Laid-Open No. 2006-152790, an intermediate portion of a strip-shaped strip made of synthetic resin fibers is folded, and the folded portion We are developing a unit that is embedded in the concrete part of the block and integrated with the block.

However, embedding strips made of synthetic resin fibers directly into the concrete is susceptible to the influence of the alkaline environment, and the concrete particles are likely to enter between the fibers and break easily. Was buried in concrete. The operation of passing through such a sheath is troublesome, and even if it is passed through the sheath, concrete nodules easily adhere to the portion coming out of the sheath, and there is a risk of breakage at that portion.
JP 2006-152786 A JP 2006-152790 A

  The problem to be solved by the present invention is that the strength of the fibrous belt is reduced due to the size of construction work and the alkalinity of concrete and particles.

The present invention is installed side by side at the front of the embankment,
In the retaining block that is moored and fixed by the anchor belt extended in the embankment,
A plurality of continuous vertical lines in the longitudinal direction of the belt arranged in parallel at intervals;
With a bendable horizontal line that is passed between the vertical lines in the width direction of the belt and at an appropriate interval in the longitudinal direction of the vertical line,
It is formed in a grid shape,
At least the base end portion of the fiber anchor belt which is resin-coated by solidifying with a thermosetting resin or a thermoplastic resin,
It is buried and fixed in the concrete that forms the block,
Parts other than the buried base end are rolled up and stored in a storage box or bag .

Since the <a> concrete block uses a fiber anchor belt, it is lightweight and flexible, so that the laying work on the embankment is easy and the workability is remarkably improved.
<B> Since the fiber anchor belt is coated with resin at least part of the required part, it is not affected by the alkalinity of the concrete, and even if noro adheres, the particles do not enter between the fibers and the strength deteriorates. I discovered that there was nothing.
<C> Since one end of the fiber anchor belt is embedded and integrated in a block or a concrete structure, there is no connection part, there is no need for connection work, and there is no concern about rusting of the connection part.
<D> There is no need to insert the fiber anchor belt into the sheath, and the construction is simple.
<E> By storing the fiber anchor belt in the storage box, it can be prevented from deterioration due to ultraviolet rays and adhesion of concrete from manufacturing to storage / shipping and construction on site, and the strength of the belt Can be kept higher.
<F> As a fiber anchor belt, the belt is passed between a plurality of vertical lines continuous in the longitudinal direction of the belt arranged in parallel at intervals and the vertical line in the width direction of the belt, and the longitudinal direction of the vertical lines By adopting a belt-like belt formed in a grid shape with a bendable horizontal line passed at an appropriate interval, the concrete enters between the lattices, and the adhesion to the concrete increases.

<1> Earth retaining block FIG. 1 shows a concrete earth retaining block 1 according to the present invention, which has reinforcing portions 3 and 3 which are continuous in parallel to the back surface of an upright plate portion 2. ing. One or a plurality of concave portions 4 are provided in the upper and lower intermediate portions of the reinforcing portion 3.

<2> Anchor belt In the figure, reference numeral 5 denotes an anchor belt for anchoring and fixing the block 1, and is composed of a belt-like woven fabric 6 manufactured by weaving polyester fibers. As shown in FIG. 7, the belt-like woven fabric 6 includes a plurality of vertical lines 7 that are continuous in the longitudinal direction of the belt 5 and arranged in parallel at intervals, and in the width direction of the belt 5, between the vertical lines 7. A bendable horizontal line 8 is passed to form a grid. The horizontal lines 8 are provided at intervals in the longitudinal direction of the belt 5.

<3> Coating One end of the fibrous anchor belt 5 is coated with a resin having a desired length. As the resin, thermosetting resin or thermoplastic resin is used, and these are coated and solidified, so that the alkalinity of the concrete, scratches caused by Noro particles entering between the fibers, the water pressure of the concrete, etc. The belt-like woven fabric 6 of the anchor belt 5 is protected from deterioration factors. If the grid belt material is thermoplastic fiber, it is preferable to use room temperature epoxy resin or urethane resin so that the material properties do not change significantly, and the material is carbon fiber or aramid fiber, which has high heat resistance. Etc., it is desirable to use a thermoplastic resin. In the embodiment, urethane resin is used. The coating method employs a method in which one end of the belt-shaped woven fabric cloth 6 is impregnated and coated in a resin melted at room temperature.

<4> Fixing the anchor belt The resin-coated end of such a belt-like woven fabric 6 is positioned at the bottom of the recess 4 of the block 1 being manufactured, and in the concrete in which a part of the end is cast. Embed in, adhere to concrete, and fix the end. The depth of embedding is about 50 mm to 300 mm, and a suitable strength is obtained even in practice about 100 mm. The portion embedded in the concrete of the belt-like woven fabric 6 needs to be sufficiently resin-coated, but the desired length of the portion coming out of the concrete is also preferably coated in order to avoid adhesion of noro and the like. As shown in FIG. 1, FIG. 5 or FIG. 6, the anchor belt 5 may be fixed either horizontally or vertically. When the strip-shaped woven fabric 5 is in a grid shape, the adhesive force in the concrete increases.

<5> Protection of Anchor Belt It is preferable that the belt-shaped woven fabric 6 to be the anchor belt 5 is wound up and stored in the storage box 9. The storage box 9 can be widely used, such as paper, plastic, or metal. As shown in FIG. 2, the storage box 9 has a size and shape that can be stored in the recess 4 of the block 1 so that one end of the belt-like cloth 6 can protrude from the bottom surface. A side surface opposite to the bottom surface is a lid 10. With the belt-like woven fabric 6 protruding, the storage box 9 is installed at the position of the concave portion 4 and concrete is placed to bury the protruding end of the belt-like woven fabric 6. Other than the portion of the belt-shaped woven fabric 6 embedded in the concrete, the concrete no stick adheres and the particles do not enter between the fibers. Moreover, if the storage box 9 is made dark, the inner strip-shaped woven fabric 6 can be further protected from ultraviolet rays. When the belt-like woven fabric 6 is used as the anchor belt 5, the lid 10 may be opened and pulled out.
As a means for protection, in addition to the box, a means for winding up the anchor belt 5 and storing it in a dark bag made of synthetic resin or the like can also be employed.

<6> Construction of retaining wall The retaining block 1 is lined up, down, left and right on the front of the position where the embankment block 1 is embanked. A bank 11 is applied behind the block 1, and the anchor belt 5 on the back of the block 1 is pulled out and stretched on the bank 11. The embankment 11 is further applied thereon, and the anchor belt 5 is fixed by friction with the sandwiched soil. When the belt-like woven fabric 6 is in a grid shape, the frictional force is increased and the fixing force in the soil is improved. The upper anchor belt 5 is extended on the upper embankment 11, and the same operation is repeated.

<7> Tensile strength of anchor belt Table 1 shows the tensile strength test results of the belt-shaped woven fabric 6 coated with resin as described above. As shown in Table 1, the tensile strength of the resin-coated belt-like woven fabric 6 shows about twice the strength when the resin coating is not performed. In terms of the type of resin, there was no significant difference in breaking load between epoxy resin and urethane resin.

<8> Situation of Breaking The belt-shaped woven fabric 6 subjected to resin coating was not broken at the resin-coated portion, but was broken at the resin interface portion or the dirty portion was broken. That is, the resin-coated portion has a higher strength than those portions. Moreover, in the experiment example which did not coat | cover, although the embedding depth was changed into 150 mm and 200 mm, the test was implemented, but all fractured at the concrete interface part, the adhesion with the concrete came off, and the edge part slipped out from the concrete. There was no example.

  One end of the belt-like woven fabric 6 is coated with a resin, and this is embedded and fixed in concrete. However, in a building, a tensile force is borne on the belt-like woven fabric 6 to reinforce the connection between concrete structures. It can also be applied to.

It is a perspective view of a earth retaining block. It is a partial perspective view of the earth retaining block to which the anchor belt is fixed. It is a perspective view of the earth retaining method using an earth retaining block. It is sectional drawing of the earth retaining method using an earth retaining block. It is a rear view of a earth retaining block. It is a rear view of a earth retaining block. It is a partial front view of a strip-shaped woven fabric. It is a perspective view of the on-site earth retaining method.

Explanation of symbols

1: Dam retaining block 2: Plate part 3: Reinforcing part 4: Recessed part 5: Anchor belt 6: Belt-like woven fabric 7: Fine band 8: String body 9: Storage box 10: Lid 11: Filling 12: Retaining wall

Claims (6)

Installed side by side in front of the embankment,
In the retaining block that is moored and fixed by the anchor belt extended in the embankment,
In the concrete that forms the block,
An earth retaining block in which at least a base end portion of a fiber anchor belt covered with a resin is embedded and fixed. The base end of the fiber anchor belt that is buried and fixed in the concrete,
By solidifying with thermosetting resin or thermoplastic resin as the resin to be coated,
The earth retaining block according to claim 1, which is protected from external factors.   2. The earth retaining block according to claim 1, wherein the fiber anchor belt is wound up and stored in a storage box. The shape of the fiber anchor belt includes a plurality of vertical lines continuous in the longitudinal direction of the belt arranged in parallel at intervals, and
With a bendable horizontal line that is passed between the vertical lines in the width direction of the belt and at an appropriate interval in the longitudinal direction of the vertical line,
2. The earth retaining block according to claim 1, wherein the earth retaining block is formed in a grid shape. The earth retaining blocks according to claim 1 are installed side by side at the front of the embankment,
Extend the fiber anchor belt on the embankment,
The earth retaining method is a method in which a fiber anchor belt is sandwiched and then fixed by friction with the soil. The earth retaining concrete structure constructed by placing concrete is constructed at the front of the embankment,
In the earth retaining method that supports sediment load by concrete structures,
In the concrete of the earth retaining concrete structure,
Burying and fixing the base end portion comprising at least a fiber anchor belt coated with resin at the base end portion;
Extend the fiber anchor belt on the embankment,
By further embankment on it, the fiber anchor belt is sandwiched and fixed by friction with the soil,
Earth retaining method that can prevent the earth retaining concrete structure from overturning.

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